#include <stdio.h>
int main(){
    int num=10;
    int* p1=&num;
    printf("num的地址=%p\n",&num);
    printf("p1指向的地址=%p\n",p1);
    printf("p1的地址=%p\n",&p1);

    *p1=100;
    printf("num值=%d\n",num);
}